التفاصيل البيبلوغرافية
العنوان: |
Performance limitations in thieno[3,4-c]pyrrole-4,6-dione-based polymer:ITIC solar cells. |
المؤلفون: |
Yang, Fan, Qian, Deping, Balawi, Ahmed Hesham, Wu, Yang, Ma, Wei, Laquai, Frédéric, Tang, Zheng, Zhang, Fengling, Li, Weiwei |
المصدر: |
Physical Chemistry Chemical Physics (PCCP); 9/21/2017, Vol. 19 Issue 35, p23990-23998, 9p |
مستخلص: |
We report a systematic study of the efficiency limitations of non-fullerene organic solar cells that exhibit a small energy loss (Eloss) between the polymer donor and the non-fullerene acceptor. To clarify the impact of Eloss on the performance of the solar cells, three thieno[3,4-c]pyrrole-4,6-dione-based conjugated polymers (PTPD3T, PTPD2T, and PTPDBDT) are employed as the electron donor, which all have complementary absorption spectra compared with the ITIC acceptor. The corresponding photovoltaic devices show that low Eloss (0.54 eV) in PTPDBDT:ITIC leads to a high open-circuit voltage (Voc) of 1.05 V, but also to a small quantum efficiency, and in turn photocurrent. The high Voc or small energy loss in the PTPDBDT-based solar cells is a consequence of less non-radiative recombination, whereas the low quantum efficiency is attributed to the unfavorable micro-phase separation, as confirmed by the steady-state and time-resolved photoluminescence experiments, grazing-incidence wide-angle X-ray scattering, and resonant soft X-ray scattering (R-SoXS) measurements. We conclude that to achieve high performance non-fullerene solar cells, it is essential to realize a large Voc with small Eloss while simultaneously maintaining a high quantum efficiency by manipulating the molecular interaction in the bulk-heterojunction. [ABSTRACT FROM AUTHOR] |
|
Copyright of Physical Chemistry Chemical Physics (PCCP) is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
قاعدة البيانات: |
Complementary Index |